【摘要】 对高速多连杆压力机因机构不平衡而产生机身振动的问题进行研究,提出一套综合平衡优化设计方案。以平衡机构9个质量属性参数为设计变量,以机身三个自由度方向上的动响应幅值线性加权和最小为目标函数,利用遗传算法进行求解。以高速多杆实验压力机为计算实例,得到基于惯性力的传统平衡方案与基于动响应的综合平衡优化方案,对比两者振动响应改进效果,并设计正交试验,通过方差分析研究各优化变量对机身各方向目标响应影响规律。结果表明,综合平衡优化设计较传统平衡方案可有效改善机身振动,且平衡滑块质量配置是影响平衡效果的最主要因素。更多还原

【Abstract】 For the vibration caused by the imbalance of the mechanism of a high-speed multi-link press,a comprehensive optimized balance was proposed. With 9 mass attribute parameters of the balance mechanism as the design variables,the linear weighted sum of fuselage’s vibration response amplitudes in three directions was taken as the objective function,and the genetic algorithm was used to solve the problem. Taking the high-speed multi-link experimental press as an instance,the traditional balance based on the inertia force and the comprehensive optimization design based on the vibratory response were obtained,with both of the vibration response being compared. Furthermore the orthogonal experiment was designed to study the influence of each optimization variable on the dynamic response of the fuselage in three directions by analysis of variance. The result shows that the optimization design on comprehensive balance can effectively eliminate the vibration compared with the traditional balance,and mass of the counterweight is the most significant factor affecting the balance effect.更多还原